Stop mechanism.



No. 745,125. PATENTED NOV. 24, 1903. G. WAIS.

STOP MECHANISM.

APPLIUATION FILED FEB. 1a, 1903.

2 SHEETS-SHEET 1.

no MODEL.

- PATENTED NOV. 24, 1903'.

C. WAIS.

STOP MECHANISM.

APPLIUATION FILED FEB. 13. 1903 2 SHEETS-SHEET 2.

N0 MODEL.

UNITED STATES fatented November 24, 1903u PATENT OFFICE.

STOP MECHANIQNL.

SPECIFICATION forming part of Letters Patent No. 745,125, dated November 24, 1903. Application filed February 13,1903, Serial No. 143.188- (No model.)

To all whom it may concern:

Be it known that I, CHRISTIANWAIS, a citi zen of the United States of America, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in StopMechanism,of which the followingisaspecification.

This invention relates to certain improvements in stop mechanisms, such as are adapted for use in connection with machines of various kinds for stoppingthe same after certain work or operations have been effected; and the object of the invention is to provide a mechanism of this general character of a simple and inexpensive nature and of a strong, compact, and durable construction which shall not be liable to become deranged or broken when in use and which shall be in a measure adjustable, so that the machine in connection with which the improved stop mechanism is used may be adjusted or set for more effective operation in connection with work of different kinds.

The invention relates to certain novel features of the construction, combination, and arrangement of the several parts of the improved stop mechanism, whereby certain important advantages are attained and the device is made simpler, cheaper, and otherwise better adapted and more convenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

In the accompanying drawings, which serve to illustrate my invention, Figure 1 is a side elevation showing a punching or shearing machine provided with a stop mechanism constructed according to my invention; and Fig. 2 is an enlarged fragmentary sectional detail view showing certain of the operative features of the stop mechanism, said mechanism being shown in the position in which it stands when set for starting the machine in connection with which it is used in motion. Fig. 3 isa view similar to Fig. 2, but showing the parts of the improved stop mechanism in the positions in which they stand after the movement of the machine in connection with which the mechanism is used has commenced. Fig. 4 is a view similar to Figs. 2 and 8, but showing the parts of the improved stop mechanism in the positions in which they stand when the movement of the ma chine in. connection with which the mechan ism is used is stopped. Fig. 5 is a detached detail view showing the plunger forming a part of the improved stop mechanism. Fig. 6 is an under side view showing the cam also forming a part of the improved stop mechanism, and Fig. 7 is a detached perspective detail view showing the wedge-block for looking the cam in adjusted position.

In the views, 1 indicates the frame of the punching or shearing machine in connection with which the improved stop mechanism is shown as adapted for use, and 2 represents the machine-shaft journaled in the ordinary way at the'upper part of said frame.

Although I have herein shown the improved stop mechanism as applied for use in connection with a punching or shearing machine, I do not wish to be understood as limiting myself to its use in this connection exclusively, since it will be evident that with suitable alterations the device may also be adapted for use in connection with other kinds of machinery.

The machine-shaft 2 is arranged to project at the rear side of the frame of the punching or shearing machine and has its said projecting portion held to turn in a bearing 3, extended up from the base of the frame, but separated by a suitable space from the upper part thereof, across which space the shaft 2 is extended and in which space is held on said shaft a loosely-mounted collar 4, having a clutch-surface 5 and also provided with a gear-surface 6, herein shown as integrally produced on the collar, and a second gearsurface 7 of larger diameter than the gearsurface 6 and detachably held on the collar.

The gear 7 is adapted to mesh with a pin ion 8, and the gear 6 is similarly adapted to mesh with a larger pinion 9, these pinions being held upon a sleeve or collar 10, keyed upon a shaft 11,,mounted for turning movement in bearings in an auxiliary frame 12, extended up above the machine-frame 1, said shaft 11 being provided at one end with a balance-wheel13 and at the opposite end with tight and loose pulleys 14, adapted to receive a band or belt from which the shaft 11 may be continuously driven. The sleeve or collar 10, on which pinions 8 and 9 are hold, is of such a length that when the pinion 8 thereon is in mesh with the gear 7, as shown in Fig. 1, the pinion 9 on the sleeve will be out of mesh with the gear 6, so that the clutch-collar 4 on the machine-shaft 2 will then be driven at one speed through the intermeshing gears 7 and 8, and when said sleeve is slid endwise on shaft 11 to engage the pinion 9 with the gear 6 the pinion 8 will be moved out of engagement with its gear 7, so that at such times the clutch-collar4 on the shaft 2 will be driven at a different speed through these intermeshing gears 9 and 6, as will be readily understood. By moving the sleeve 10 endwise on shaft 11 it will therefore be seen that the collar 4 on shaft 2 may be driven at different speeds in order to adapt the machine for work of different kinds to be effected.

15 indicates a clutch member or collar also held upon the machine-shaft 2 and provided with a clutch-surface 16, adapted for engagement with the clutchsurfa-ce 5 on collar 4; but said collar or member 15 is held on a key or feather 17 on shaft 2, so as to turn with the shaft, while being capable of endwise movement thereon,by which means its clutchsurface 16 may be engaged with or disengaged from the clutch-face 5 of said collar 4. By this construction it will be evident that the member 15 when slid in one direction on shaft 2 to engage its clutch-face 16 with the face 5 of collar 4 will serve to lock the shaft 2 to turn in unison with said collar 4 when actuated through the gearing from the shaft 11, as above described, so that at such times said shaft 2 will be driven to actuate the punching or shearing or other mechanism, and when the member 15 is slid in the other direction on shaft 2 to withdraw its clutchface 16 from the clutch-face 5 of collar 4 the shaft 2 will be disengaged from said collar 4 and the rotation of the shaft will be stopped, as will also the operation of the operative parts of the machine in connection with which the improved stop mechanism is used.

18 indicates an annular groove or channel produced in the member 15 and formed with inclined walls, as indicated in Fig. 4, so that the said groove or channel is made dovetailed or undercut in cross-section, and beyond said groove or channel 18 the member 15 is formed with a head or enlargement 19 of circular or disk-like form, in the perimeter of which is formed a guide groove or channel 20, the function of which will be hereinafter set forth.

The head or enlargement 19 of the clutch member 15 is adapted to be engaged by one arm 22 of a bell-crank'or elbow lever pivoted upon a stud or pin,as seen at 21,and having its opposite arm 23 extended at right angles to the arm 22 and adapted to be engaged in a slotted opening 24, produced in a plunger or slide-bar 25, held for endwise movement in the bore of a casing 26, carried on the frame, the upper end of said slide-bar or plunger 25 being made in reduced diameter and rounded to form a shank 27, whereon is coiled a spring 28, the upper end of which is engaged upon the roof of the cavity in casing 26, while the lower end thereof is engaged on the shoulder formed at the lower end of said reduced upper end of the slide-bar or plunger, the tension of the spring 28 being in this way exerted to press said plunger or slidebar normally downward in the position indi cated in Figs. 1, 3,and 4.

The upper end of the plunger or slide-bar 25 is made with an enlargement 29, forming a stop to limit the downward movement of the plunger under, the tension of the spring by engagement on the upper end of the easing 26, and said enlarged upper end is formed with forks 30, between which is pivoted one end of a lever 31, fulcrumed, as shown at 32, on a link extended up from a bracket held to the upper end of the casing 26, the opposite end of said lever 31 having connection with a rod 34, extended downward toward the base of the machine-frame and connected with an arm 35 on a shaft 36, held for rocking movement in bearings 37 37 on said frame, and provided with a treadle 38, by means of which it may be rocked by the foot of an attendant. A spring 39 is provided connected with the arm 35 and adapted to hold the treadle 38 normally raised, so as to reinforce the action of the spring 28 in holding the plunger 25 pressed normally downward. By this construction it will be seen that when the treadle 38 is depressed by the foot of the attendant the shaft 36 is rocked in its bearings, and owing to the connection of the arm 35 with the plunger 25 through the medium of the lever 31 and rod 34 the movement of said shaft 36 is communicated to said plunger to lift the same to the position shown in Fig. 2, by which lifting of the plunger the elbow or bell-crank lever is also moved pivotally, so that its arm 22 is caused to push the clutch member 15 endwise on shaft 2 in such a way as to engage the clutch-face 16 on said member with the face 5 on the rotating collar 4, so that the movement of the shaft 11 willbecommunicated to the machine-shaft 2,as above described.

The slot or opening 24 in plunger 25 is of such a length as to permit endwise movement of the plunger irrespectiveof the movement of the bell-crank lever, so that when pressure is removed from the treadle 38 the springs 39 and 28 are permitted to return the parts to their normal positions, the plunger 25 being then depressed,as shown in Figs. 1, 3, and 4, said plunger when in its depressed position having its lower end arranged to stand just in front of the head or enlargement 19 on the clutch member 15 and immediately above the groove or channel 18 therein, as shown in Fig. 3 of the drawings. 7

The lower end of the plunger or slide-bar 25 is provided with an antifriction-roller 40, held upon it, and with said roller is adapted to be engaged by a cam 41, formed of a metal piece or block having an inclined orcam surface adapted to project beyond the front surface of the said head or enlargement 19 on the clutch member 15, as shown in Figs. 1, 2, and 6, and provided with a portion 42, adapted to extend over and fit upon the perimeter of said head or enlargement and with an interiorly-directed projection 43 arranged to engage in the annular groove of said head or enlargement, so as to form an effective means for holding the cam-block securely to the head or enlargement while permitting of movement thereof around the perimeter of said head 19.

44 indicates an opening produced in the cam block 41 and in which is collared to loosely turn a screw 45, the inner end of which has threaded engagement with a central opening 46 in a wedge-shaped block or piece 47 of the form indicated in Figs. 4 and 7 and having'inclined sides adapted to fit against the inclined or undercut walls of the groove or channel 18 in the member 15, said block 47 being insertible in said groove or channel at an enlarged portion 48 thereof, as shown in Fig. 3. By this construction it will be seen that when the screw 45 is turned in one direction the inclined sides of the block 47 are withdrawn from forcible engagement with the undercut sides of the groove or channel 18, in which said block 47 is engaged, so that it is permitted to adjust the cam 41 around the member 15, the engagement of the projection '43 on the extended part 42 of the cam-block with the groove 20 in the head or enlargement 19 of member 15 serving to guide the camblock in its adjustment, and a series of graduations 42 suitably arranged on the head or enlargement serving to indicate the position of the cam when adjusted. When the cam has been adjusted to a desired position, as above described, the screw 45 may be turned in the opposite direction, so as to draw the inclined sides of the wedge-block 47 in forcible engagement with the undercut sides of the groove or channel 18 in member 15, whereby the cam-block will be locked in its adjusted position.

When the member 15 has been moved endwise on shaft 2 to engage its clutch-faceld with the face 5 of member 4, the inclined pro jecting or cam surface of the cam-block 42, which extends in front of the head or enlargement 19 of member 15, will be adapted in the rotation of the shaft 2 to be engaged with the antifriction-roller 40 on the lower end of the plunger or slide-bar 25 in such a way as to impel the clutch member 15 to move endwise on the shaft 2, but in an opposite direction to which it was before moved by the bellcrank lever, so that its clutch-face 16 is withdrawn from engagement with the face 5 of member 4, whereby the rotation of the shaft 2 from said member 4 will be stopped and said shaft, together with the operative parts of the machine in connection with which the improved stop mechanism is used, will stand at rest until the treadle 38 has been again dea full turn and is then stopped against move ment, and it will be evident that by the adjustment of the cam-block 42 around the head or enlargement 19 of the member 15 the point at which the turning of the shaft 2 and consequent operation of the machine is stopped may be adjusted as desired. Where the device is employed in connection with a punching-machine, as herein shown, thisfeature of adjustment of the stopping of the operative parts is very important, since it permits of stopping the plunger 50 of the punch at any desired point in its stroke, so that'the lower end of the punch or other tool may be stopped immediately above the surface of materials of different thicknesses, so that less care is required in using the machine and greater speed and increased output of work are effected.

The two-speed gearing above described is also of great advantage in connection with the stop mechanism above described when used upon machines of this general character, since it permits of increasing the speed of the machine when adjusted for use upon thin materials and of decreasing the speed when adjusted for use upon thicker materials, where increased power is necessary.

From the above description it will beseen that the improved stop mechanism constructed according to my invention is of an extremely simple and inexpensive nature and is especially well adapted for use, since it permits of materially increasing the output of work produced by the machinery in connection with which it is used, and it will also be obvious from the above description that the device is capable of considerable modification without material departure from the principlesand spirit of the invention, and for this reason I do not wish to be understood as limiting myself to the precise form and arrangement of the several parts of the device as herein set forth in carrying out my invention in practice.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a stop mechanism, the combination of a shaft, two members having clutch-faces for reciprocal engagement, one of said members being mounted on the shaft and movable into and out of engagement with the other member, means for actuating the movable member to engage it with the other member, a cam carried by said movable member, a part adapted for engagement with said cam for moving said member out of engagement with the other n1ember, and mechanism connected with and adapted for simultaneously'operatin g the actuating means for the movable member and the said cam-engaging part, substantially as set forth.

2. In a stop mechanism, the combination of a shaft, two members havingclutch-faces for reciprocal engagement, one of said members being mounted on the shaft and movable into and out of engagement with the other member, means for actuating the movable member to engage it with the other member and a cam on the said movable member and adjustably held thereon and adapted for engagement with a part for actuating the said movable member to move it out of engagement with the other member, substantially as set forth.

3. In a stop mechanism, the combination of a shaft, two members having clutch-faces for reciprocal engagement, one of said members being mounted on the shaft and movable in and out of engagement with the other member, a cam on the movable member, a part arranged for engagement with the cam for actuating the movable member to disengage it from the other member and a lever having operative connection with and actuated from the cam-engaging part, said lever being engaged with the movable member and being adapted, when actuated, to move the movable member in engagement with the other member.

4. In a stop mechanism, the combination of a shaft, two members one of which is mounted on the shaft and movable in and out of engagement with the other, a slide-bar, a pivoted-lever having one end engaged with said slide-bar and having its other end engaged with the movable member to actuate it when said lever is moved in unison with the slidebar to engage it with the other member, means for operating the slide-bar and a cam held by the movable member and adapted for engagement with the slide-bar to move the movable memberout of engagement with the other member, substantially as set forth.

5. In a stop mechanism, the combination of a shaft, two members one of which is mounted on the shaft for movement in and out of engagement with the other, a slide-bar having a slot, a lever having one end engaged in said slot and its other end engaged with the member on the shaft to move it in engagement with the other member and a cam adjustably held on said movable member and arranged for engagement with the slide-bar to move the member on the shaft out of engagement with the other member, substantially as set forth.

6. In a stop mechanism, the combination of a shaft, a member having driving means and arranged to turn loosely on the shaft, a member held to turn with but capable of endwise movement on the shaft to engage it with and disengage it from said first-named member and having an annular groove produced in it and provided with undercut sides, a cam adjustably held on said member, a wedgeblock adj ustably held in said groove, a screw collared on the cam and engaged with the wedge-block for locking the cam in position on said member means for moving said member to engage it with the first-named member and a part with which said cam is adapted for engagement to disengage the members, substantially as set forth.

7. In a stop mechanism, the combination of a shaft, two members one of which is mounted on the shaft for movement in and out of engagement with the other, a slide-bar having a slot, a lever having one end engaged with said slot and its other end engaged with the member on the shaft to move it in engagement with the other member, said slidebar having a reduced upper end and being mounted for endwise movement, a casing in which the slide-bar is movable, a spring in said casing and engaged with the slide-bar for moving the same in one direction, means for moving the slide-bar in an opposite direction and a cam adjustably held on the movable member and arranged for engagement with the slide-bar to move the member on the shaft out of engagement with the other member, substantially as set forth.

8. In a stop mechanism, the combination of two members having clutch-faces for reciprocal engagement, one of the members being movable into and out of engagement with the other, a part movable in different directions and devices adapted, when the partis moved in different directions, to be alternately actuated therefrom, one of said devices being adapted, when actuated, to operate the movable member to engage it with the other member and the other device being adapted to operate the movable member to disengage it from the other member.

9. In a stop mechanism, the combination of two members having clutch-faces for reciprocal engagement, one of the members being movable, means to operate the movable mem her to engage its clutch-face with that of the other member, adjustable means to operate the movable member to disengage its clutchface from that of the other member, and mechanism to reversely and simultaneously actuate both of said operating means.

10. In a stop mechanism, the combination of two members having clutch-faces for re ciprocal engagement, one of the members being movable, means to operate the movable member to engage its clutch-face with that of the other member and means comprising a device movable in unison with the operating means and a part adjustably held upon the movable member and arranged for contact to disengage said movable member from the other member.

Signed at Cincinnati, Ohio, this 30th day of January, 1903.

CHRISTIAN WATS. 

